First principle approach towards logic design using hydrogen‐doped single‐strand DNA. Issue 1 (29th October 2018)

• Record Type: Journal Article
• Authors: Roy, Pradipta; Dey, Debarati; De, Debashis
• Is Part Of: IET nanobiotechnology. Volume 13:Issue 1(2019)
• Page Start: 77
• Page End: 83
• Publication Date: 2018-10-29
• Subjects: molecular electronics -- Green's function methods -- hydrogen -- logic gates -- density functional theory -- adsorption -- DNA -- logic design -- logic circuits; hydrogen molecule -- contrary sparse cloud -- current–voltage characteristics -- Boolean logic gate operations -- first principle approach -- logic design -- hydrogen‐doped single‐strand DNA -- molecular logic gate -- density functional theory -- electronic transmission characteristics -- H -- analytical model -- NXOR logic gates -- Ex‐OR logic gates -- OR logic gates -- hydrogen‐doped‐ssDNA chain -- nonequilibrium Green's function -- nucleobases -- dense electron cloud -- improved electronic transmission -- enhanced logic properties -- H‐ssDNA device -- enhanced quantum‐ballistic transmission -- gold electrode; Biotechnology -- Periodicals; Nanotechnology -- Periodicals; 660.6
• DOI: 10.1049/iet-nbt.2018.5027
• Languages: English
• ISSNs: 1751-8741

Abstract

Abstract : Molecular logic gate has been proposed using single‐strand DNA (ssDNA) consisting of basic four nucleobases. In this study, density functional theory and non‐equilibrium Green's function based first principle approach is applied to investigate the electronic transmission characteristics of ssDNA chain. The heavily hydrogen‐doped‐ssDNA (H‐ssDNA) chain is connected with gold electrode to achieve enhanced quantum‐ballistic transmission along 〈1 1 1〉 direction. Logic gates OR, Ex‐OR, NXOR have been implemented using this analytical model of H‐ssDNA device. Enhanced logic properties have been observed for ssDNA after H adsorption due to improved electronic transmission. Dense electron cloud is considered as logic 'high' (1) output in presence of hydrogen molecule and on the contrary sparse cloud indicate logic 'low' (0) in the absence of hydrogen molecule. Device current is significantly increased from 0.2 nA to 2.4 µA (approx.) when ssDNA chain is heavily doped with hydrogen molecule. The current–voltage characteristics confirm the formation of various Boolean logic gate operations.